s = input("Введите скобочную последовательность ")
while "()"in s or "{}" in s or "[]" in s or "<>" in s:
    if "()" in s:
        s = s.replace("()", "")
    if "{}" in s:
        s = s.replace("{}", "")
    if "[]" in s:
        s = s.replace("[]", "")
    if "<>" in s:
        s = s.replace("<>", "")
if s == "":
    print ("True")
if s != "":
    print ("false")
